Smith ruled out of final day’s play after experiencing delayed concussion symptoms

Steve Smith floored

VideoSteve Smith was forced from the field after a bouncer from Jofra Archer struck him in the neck.Video: Getty Images

Australia has suffered a massive blow on the final day of the second Test at Lord’s with Steve Smith ruled out of the remainder of the match due to delayed concussion.

Smith was felled by a rapid Jofra Archer bouncer that struck him on the back of the neck during an eventful middle session yesterday.

The visitors have confirmed they’ll be lodging the paperwork for Queensland allrounder Marnus Labuschagne to replace Steve Smith as the concussion substitute.

The concussion rule has been in play for a few years in Australian domestic cricket, however it'll be the first time the rule is activated in Test cricket.

Smith was forced to retire hurt on 80* after the heavy blow, but bravely returned to bat after passing the concussion tests that immediately followed.

Camera IconLONDON, ENGLAND - AUGUST 17: Steve Smith of Australia is struck by a delivery from Jofra Archer of England during day four of the 2nd Specsavers Ashes Test between England and Australia at Lord's Cricket Ground on August 17, 2019 in London, England. (Photo by Ryan Pierse/Getty Images)Picture: Getty Images

However Cricket Australia has confirmed the 30-year-old reported grogginess and a headache this morning, resulting in him being ruled out for the final day’s play.

Smith’s availability for the third Test at Headingley now appears to be in huge doubt, with a short turnaround time of just three days.

There was further concern for the former captain’s left forearm after he wore another Jofra bouncer on the flesh, but scans yesterday confirmed he has avoided any fracture.